On the topic of the custom folder, I would also like to bring it to your attention that it ended up in Users\_____\AppData\Roaming\RenPy\BlackCloset after an upgrade from the demo for this Windows 7 user (and I believe it did the same thing on my 8.1/10 machine but I'd have to double check). It's not a problem for me since I have AppData unhidden, but it might be a problem for the less computer savvy.

Yeah, it is unfortunately likely to end up in a slightly difficult location for computer-confused people to reach. For technical reasons we can't use the actual game folder, because this can cause permissions havoc on Windows due to all their protections around Program Files, so we have to go under the documents-and-settings hierarchy somewhere and "with the saved games" seemed like a reasonable approach.